Bicycle frame



FIG. 1 is a perspective of the bicycle frame of the present invention;

FIG. 2 is a a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a side elevational view taken from the right side as viewed in FIG. 1;

FIG. 5 is a front elevational view; and,

FIG. 6 is a side elevational view taken form the left side as viewed in FIG. 1. 

The ornamental design for a bicycle frame, as shown and described. 